Ms. Catherine Ellis is a registered California registered Geotechnical Engineer and has more than 20 years of progressively challenging engineering experience including the San Francisco Bay Area, the Pacific North-West, and the U.S. Territory of Guam. Her services span providing design recommendations and construction support under the roles of geotechnical engineer-of-record and construction materials engineering and testing services. Ms. Ellis is well versed in developing mitigation measures for liquefiable soils; soft, marine soils; undocumented fill sites; high groundwater conditions; and sites with bedrock transitions.